<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<frameset rows="15%,*">
    <frame src="html11A.html">
   <frameset cols="15%,*">
       <frame src="html11B.html">
       <frame src="html11C.html">
   </frameset>
</frameset>
</html>